無む灰かい

noun which may take the genitive case particle 'no'

ashless; ash-free

Technical term used in chemistry, engineering, or fuel contexts to describe a substance that produces no ash when burned or contains no ash residue.

• 無む灰かいの石せき炭たんは燃ねん焼しょう時じに灰はいをほとんど出ださない。

  Ashless coal produces almost no ash when burned.

• このフィルターは無む灰かい紙しでできている。

  This filter is made of ashless paper.